TPS929160-Q1
ZHCSNG0 – APRIL 2023
www.ti.com.cn
7 Detailed Description
7.1 Overview
TPS929160-Q1 is an automotive, 16-channel LED driver with FlexWire interface to address increasing
requirements for individual control of each LED string. Each of the device channels can support both analog
dimming and pulse-width-modulation (PWM) dimming, configured through its FlexWire serial interface. The
internal electrically erasable programmable read-only memory (EEPROM) allows users to configure device in the
scenario of communication loss to fulfill system level safety requirements.
The FlexWire interface is a robust address-based master-slave interface with flexible baud rate. The
interface is based on multi-frame universal, asynchronous, receiver-transmitter (UART) protocol. The unique
synchronization frame of FlexWire reduces system cost by saving external crystal oscillators. It also supports
various physical layer with the help of external physical layer transceiver such as CAN or LIN transceivers. The
embedded CRC correction is able to ensure robust communication in automotive environments. The FlexWire
interface is easily supported by most of MCUs in the markets.
Each output is a constant current source with individually programmable current output and PWM duty cycle.
PWM phase shift is supported for the output channels to improve the EMC performance and reduce the output
noise. Each channel features various diagnostics including LED open-circuit, short-circuit and single-LED short-
circuit detection. The on-chip analog-digital convertor (ADC) allows the controller to real-time monitor loading
conditions.
To further increase robustness, the unique fail-safe of the device state machine allows automatic switching
to FAIL-SAFE states in the case of communication loss, for example, MCU failure. The device supports
programming fail-safe settings with user-programmable EEPROM. In FAIL-SAFE states, the device supports
different configurations if output fails, such as one-fails-all-fail or one-fails-others-on. Each channel can be
independently programmed as on or off in FAIL-SAFE states. The FAIL-SAFE state machine also allows the
system to function with pre-programmed EEPROM settings without presence of any controller in the system,
also known as stand-alone operation.
The microcontroller can access each of the devices through the FlexWire interface. By setting and reading back
the registers, the master, which is the microcontroller, has full control over the device and LEDs. All EEPROMs
are pre-programmed to default values. TI recommends that users program the EEPROM at the end-of-line for
application-specific settings and FAIL-SAFE configurations.
Copyright © 2023 Texas Instruments Incorporated
English Data Sheet: SLVSG60
16
Submit Document Feedback
Product Folder Links: TPS929160-Q1
TI [ TEXAS INSTRUMENTS ]
